Question

Identify the compounds that contain both ionic and covalent bonds.

• A. $NaOH$
• B. $CsF$
• C. $HCl$
• D. $KCN$

Answer 1

Answer: (A), (D)

The correct options are
A $NaOH$
D $KCN$

In the given compounds, all compounds are ionic which on dissociation gives ions.

$NaOH\to N{a}^{+}+O{H}^{-}$

$HCl\to H^{+}+C{l}^{-}$

$KCN\to K^{+}+C{N}^{-}$

$CsF\to C{s}^{+}+F^{-}$

But in NaOH and KCN, covalent bonds are also present.

The bond between Na${}^{+}$ and OH${}^{-}$ and K${}^{+}$ and CN${}^{-}$ are ionic bonds

While bonds between O-H is covalent single bond and bond between $C\equiv N$ is a covalent triple bond.

Hence, options (A) and (D) are both correct.